JP2006238613A - Geared motor, and closet seat, device for opening/closing closet seat cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a geared motor in which the limit value can be set low when a torque limiter is employed so that a gear is not damaged with an impact load, or the like, and to provide a closet seat and a device for opening/closing a closet seat cover. <P>SOLUTION: When geared motors 10A and 10B are operated in a closet seat and a device 1 for opening/closing a closet seat cover, its driving force is transmitted through planetary gear mechanisms 15A and 15B to a closet seat cover output gear 18A and a closet seat output gear 18B thus opening/closing the closet seat cover or the closet seat. Torque limiters 30A and 30B for releasing an impact are built in sun gears 20A and 20B and control the torque at a moment in time when the torque is low and significant variation does not occur in the torque before the motor is decelerated by the planetary gear mechanisms 15A and 15B. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a geared motor device that transmits a driving force of a motor via a power transmission wheel train, and a toilet seat / toilet lid opening / closing device including the geared motor device.

  A toilet seat and toilet lid opening / closing device that electrically opens and closes the toilet seat and toilet lid of a Western-style toilet has been proposed. In such a toilet seat / toilet lid opening / closing device, a geared motor device that reduces the driving force of the motor with a power transmission wheel train Is transmitted to the rotating shaft of the toilet seat or toilet lid (see, for example, Patent Document 1).

In a geared motor device used in such a toilet seat / toilet lid opening / closing device, a gear made of a soft resin such as perprene is used as a technique for avoiding an impact load, thereby forcibly skipping a tooth when an impact is applied. There is a way to release the shock by causing the.
JP 2002-372122 A

  However, when a gear is molded using a soft resin, there is a problem in that tooth spatter does not occur even when an impact is applied due to dimensional variation during molding, and the gear may be damaged. However, when a torque limiter of the type whose output shaft is urged by a leaf spring is connected to the output gear of the power transmission wheel train, it is necessary to set a high limit value in consideration of variations. However, there is a problem that resin gears cannot withstand and metal gears must be used.

  In view of the above problems, an object of the present invention is to provide a geared motor device capable of setting a torque limit value low even when a torque limiter is used so that the gear is not damaged by an impact load or the like. And a toilet seat / toilet lid opening / closing device provided with the geared motor device.

  In order to solve the above-mentioned problems, in the present invention, in a motor device with a gear having a motor and a power transmission wheel train for decelerating and outputting the driving force of the motor, the power transmission wheel train includes the motor A planetary gear mechanism that mechanically connects the sun gear to the output side and outputs rotation of the sun gear toward the output gear via the planetary gear, and a torque limiter is incorporated in the sun gear. It is characterized by.

  In the present invention, the power transmission wheel train includes a planetary gear mechanism as a speed reduction mechanism, and a torque limiter is incorporated in the sun gear of the planetary gear mechanism. For this reason, when an impact or the like is applied, the torque limiter operates, so that the gear can be prevented from being damaged. The torque limiter is incorporated in the sun gear, and the torque limiter value is used to control the torque when the torque is low and the torque does not vary greatly before the planetary gear mechanism decelerates. Can be set low.

  In the present invention, the sun gear includes, for example, a drive-side sun gear body mechanically connected to the motor side, a driven-side sun gear body that meshes with the planetary gear and is driven by the drive-side sun gear. The torque limiter is configured between the drive-side sun gear body and the driven-side sun gear body.

  Here, as the torque limiter, a concave portion formed on one circumferential surface of the driving side sun gear body and the driven side sun gear body, an engaging member inserted into the concave portion, A spring provided with a spring for biasing the engaging member into the recess can be used. In this case, the driving force from the driving-side sun gear body to the driven-side sun gear body through the engaging member. Is transmitted.

  The motor device with gears according to the present invention can be used for applications such as rotating and driving at least one of a toilet lid and a toilet seat in a toilet lid / toilet seat opening / closing device, for example.

  In the present invention, the power transmission wheel train includes a planetary gear mechanism as a speed reduction mechanism, and a torque limiter is incorporated in the sun gear of the planetary gear mechanism. Therefore, when an impact is applied, the torque limiter is activated. Therefore, the gear can be prevented from being damaged. The torque limiter is incorporated in the sun gear, and the torque limiter value is used to control the torque when the torque is low and the torque does not vary greatly before the planetary gear mechanism decelerates. Can be set low. Therefore, even when a resin gear is used for the power transmission wheel train, it can withstand the torque.

  Hereinafter, a geared motor device to which the present invention is applied and a toilet lid / toilet seat opening / closing device including the geared motor device will be described with reference to the accompanying drawings.

(overall structure)
FIG. 1 is an explanatory diagram showing a configuration of a toilet lid / toilet seat opening / closing device provided with a geared motor device according to Embodiment 1 of the present invention. FIGS. 2A and 2B are a plan view and a cross-sectional view of a motor mounting portion, respectively, showing a layout of essential parts of the toilet lid / toilet seat opening / closing device shown in FIG. 1 corresponds to a cross-sectional view taken along line X1-X1 ′ in FIG. 2A, and FIG. 2B corresponds to a cross-sectional view taken along line X2-X2 ′ in FIG.

  1 and 2 (a) and 2 (b), a toilet lid / toilet seat opening / closing device 1 according to this embodiment is for electrically opening and closing a toilet lid (not shown) and a toilet seat (not shown) of a Western-style toilet. The case 6 is constituted by the first case body 61, the second case body 62, and the third case body 63, and the toilet lid shaft 4 for rotationally driving the toilet lid is driven from the inside of the case 6. The distal end side and the distal end side of the toilet seat shaft 5 for rotationally driving the toilet seat protrude. Here, the toilet lid shaft 4 is a shaft body, and a cylindrical receiving portion 64 formed in the first case body 61 is fitted inside the cylindrical portion 41 on the proximal end side of the toilet lid shaft 4. On the other hand, the toilet seat shaft 5 is a cylindrical body that is coaxially fitted to the outside of the toilet lid shaft 4, and is fitted inside a cylindrical portion 65 formed in the third case body 63. Therefore, the toilet seat shaft 5 and the toilet lid shaft 4 are in a state in which each can independently rotate about the axis.

  In the toilet lid / toilet seat opening / closing apparatus 1 configured as described above, the first geared motor device 10A is configured as a driving device for the toilet lid shaft 4, and the first driving device is configured as the driving device for the toilet seat shaft 5. Two geared motor devices 10B are configured, and the configuration of these geared motor devices 10A and 10B will be described below. At this time, the direction in which the toilet seat shaft 5 and the toilet lid shaft 4 protrude is defined as the + Z direction in the axial direction, and the opposite side is defined as the −Z direction.

(Configuration of First Geared Motor Device 10A)
FIG. 3 is a cross-sectional view of a torque limiter incorporated in a toilet lid / toilet seat opening / closing device equipped with a geared motor device to which the present invention is applied.

  First, the first gear-equipped motor device 10A has a first motor 11A fixed in the case with the rotation shaft 12A directed in the + Z direction, and the driving force from the first motor 11A is applied to the toilet lid shaft 4. It has a first power transmission wheel train 19A for decelerating and transmitting to a toilet lid output gear 18A formed on the base end side. The first power transmission wheel train 19A includes a pinion 13A fixed to the rotary shaft 12A of the first motor 11A, an input gear 14A meshing with the pinion 13A, and a first planetary gear mechanism 15A as a speed reduction mechanism. The carrier pinion 28A of the first planetary gear mechanism 15A meshes with the toilet lid output gear 18A. As shown in FIG. 2B, a potentiometer (not shown) for detecting the rotational position is arranged for the first planetary gear mechanism 15A through the potentiometer gear 40A.

  Again in FIGS. 1 and 2 (a) and 2 (b), the sun gear 20A of the first planetary gear mechanism 15A includes a drive-side sun gear body 21A that meshes with the input gear 14A (motor 11A side), A driven-side sun gear body 22A disposed in the −Z direction with respect to the drive-side sun gear 20A, and external teeth formed on a shaft portion on the −Z-direction side of the driven-side sun gear body 22A; A plurality of planetary gears 26A mesh with the movable internal gear 29A on the outer peripheral side of the external teeth and the fixed internal gear 25A fixed to the case 6. Each of the plurality of planetary gears 26A is rotatably supported by the planetary holder 27A, and the planetary holder 27A is disposed inside the bottomed carrier pinion 28A disposed on the −Z direction side from the planetary gearholder 27A. The planetary holder 27A slides with the bottom wall. Since such a layout is adopted, in the first geared motor device 10A, the carrier pinion 28A is arranged on the −Z direction side even though the rotating shaft 12A of the first motor 11A protrudes in the + Z direction. The toilet lid output gear 18A is meshed. In this embodiment, the number of teeth of the fixed internal gear 25A is 36, the number of teeth of the movable internal gear 29A is 33, and even if the number of teeth is changed, both internal teeth are displaced. Thus, the same planetary gear 26A can be engaged.

  Here, in the sun gear 20A of the first planetary gear mechanism 15A, the first torque limiter 30A shown in FIG. 3 is configured between the drive-side sun gear body 21A and the driven-side sun gear body 22A. Transmission of driving force from the driving side sun gear body 21A to the driven side sun gear body 22A is performed via the first torque limiter 30A.

  As such a first torque limiter 30A, in this embodiment, the driven-side sun gear body 22A is formed with a cylindrical portion 221 that protrudes toward the drive-side sun gear body 21A. It is slidably fitted to the outer peripheral side of the cylindrical portion 211 protruding from the sun gear body 21A toward the driven sun gear body 22A. Three through holes 34 penetrating in the radial direction are formed in the cylindrical portion 221, and six grooves 31 (concave portions) are formed in the outer peripheral surface of the cylindrical portion 211. The three through holes 34 are formed at positions opposite to every other six grooves 31, and the three roller pins 32 (engaging members / rotating members) are formed between the through holes 34 and the grooves 31. It is arranged so as to straddle both. A coil spring 33 is disposed outside the cylindrical portion 221 and urges the roller pin 32 toward the bottom of the groove 31. Accordingly, when the output side is within the range of the normal load, the roller pin 32 is disposed so as to straddle both, so that the driving force of the driving side sun gear body 21A can be transmitted to the driven side gear body 22A, and the output side When an excessive torque is applied to the roller spring 32, the roller pin 32 escapes from the groove 31 against the urging force of the coil spring 33, so that the driving force of the drive side sun gear body 21A is cut off and is not transmitted to the driven side sun gear body 22A.

(Operation of first geared motor device 10A and its effect)
1 and FIGS. 2A and 2B, when the first geared motor device 10A is operated, the driving force of the rotating shaft 12A is the pinion 13A and the sun gear of the first planetary gear mechanism 15A. 20A, the planetary gear 26A, the planetary holder 27A, and the carrier pinion 28A are transmitted to the toilet lid output gear 18A, the toilet lid shaft 4 rotates around the axis, and the toilet lid is driven in the opening direction or the closing direction.

  During such an operation, for example, while the first geared motor device 10A is driving the toilet lid shaft 4 in the opening direction, an impact is applied to the toilet lid (output side), and the operation is hindered. Then, in the first torque limiter 30 </ b> A, the roller pin 32 pushes and spreads the coil spring 33, escapes from the groove 31 fitted so far, slips, and moves to the adjacent groove 31 to release an excessive force. Such slip is continued while an excessive load is applied. Accordingly, an excessive load is not applied to the gears (pinion 13A, input gear 14A, first planetary gear mechanism 15A, carrier pinion 28A) and toilet lid output gear 18A constituting the first power transmission wheel train 19A.

  Moreover, in this embodiment, the torque limiter 30A is incorporated in the sun gear 20A, and controls the torque when the torque is low before the planetary gear mechanism 15A decelerates and there is no great variation in torque. . For this reason, since the limiter value of the torque limiter 30A can be set low, in this embodiment, the gears (pinion 13A, input gear 14A, first planetary gear mechanism 15A, carrier pinion 28A) constituting the first power transmission wheel train 19A are configured. ) And the toilet lid output gear 18A) are made of resin, but such resin gears can sufficiently withstand and are not damaged.

(Configuration of Second Geared Motor Device 10B)
In the toilet lid / toilet seat opening / closing device 1 according to the present embodiment, a second geared motor device 10B is arranged in parallel with the first geared motor device 10A, and the second geared motor device 10B rotates. The second motor 11B fixed in the case with the shaft 12B directed in the -Z direction, and the driving force from the second motor 11B is decelerated to the toilet seat output gear 18B formed on the base end side of the toilet seat shaft 5. And a second power transmission wheel train 19B. The second power transmission wheel train 19B includes a pinion 13B fixed to the rotating shaft 12B of the second motor 11B, an input gear 14B meshing with the pinion 13B, and a second planetary gear mechanism 15B as a speed reduction mechanism. And an idle gear 17B that meshes with the carrier pinion 28B of the second planetary gear mechanism 15B, and the idle gear 17B meshes with the toilet seat output gear 18B. The toilet seat output gear 18B and the toilet seat shaft 5 are connected to each other by an engaging portion such as a protrusion formed on one side and a groove formed on the other side. The toilet seat output gear 18B and the third case body 63 are connected to the ends of the auxiliary springs 8 mounted around the cylindrical portion of the toilet seat output gear 18B, and the auxiliary springs 8 are connected to the toilet seat shaft. 5 is urged in the opening direction. Further, as shown in FIG. 2 (a), a potentiometer (not shown) for detecting the rotational position via the potentiometer gear 40B is arranged for the second planetary gear mechanism 15B.

  Again in FIGS. 1 and 2 (a) and 2 (b), the sun gear 20B of the second planetary gear mechanism 15B includes a drive-side sun gear body 21B that meshes with the input gear 14B (motor 11B side), A driven-side sun gear body 22B disposed in the + Z direction with respect to the drive-side sun gear 20B, external teeth formed on the shaft portion on the + Z-direction side of the driven-side sun gear body 22B, and the external teeth A plurality of planetary gears 26 </ b> B mesh with the movable internal gear 29 </ b> B on the outer peripheral side and the fixed internal gear 25 </ b> B fixed to the case 6. Each of the plurality of planetary gears 26B is rotatably supported by the planetary holder 27B. The planetary holder 27B is disposed inside a bottomed carrier pinion 28B disposed on the −Z direction side from the planetary holder 27B. The planet holder 27B slides on the bottom wall. Since such a layout is adopted, in the second geared motor device 10B, the carrier pinion 28B is located on the + Z direction side even though the rotating shaft 12B of the second motor 11B protrudes in the −Z direction. The toilet lid output gear 18B is meshed. In this embodiment, the number of teeth of the fixed internal gear 25B is 36, the number of teeth of the movable internal gear 29B is 33, and even if the number of teeth is changed, both internal teeth are displaced. Thus, the same planetary gear 26A can be engaged.

  Here, in the sun gear 20B of the second planetary gear mechanism 15B, the second torque limiter 30B is configured between the drive-side sun gear body 21B and the driven-side sun gear body 22B, and the drive-side sun gear body. Transmission of the driving force from 21B to the driven sun gear body 22B is performed via the second torque limiter 30B.

  As such a second torque limiter 30B, in this embodiment, as shown in FIG. 3, the driven-side sun gear body 22B protrudes toward the drive-side sun gear body 21B, as in the first torque limiter 30A. The cylindrical portion 221 is slidably fitted to the outer peripheral side of the cylindrical portion 211 protruding from the driving-side sun gear body 21B toward the driven-side sun gear body 22B. Three through holes 34 penetrating in the radial direction are formed in the cylindrical portion 221, and six grooves 31 (concave portions) are formed in the outer peripheral surface of the cylindrical portion 211. The three through holes 34 are formed at positions opposite to every other six grooves 31, and the three roller pins 32 (engaging members / rotating members) are formed between the through holes 34 and the grooves 31. It is arranged so as to straddle both. A coil spring 33 is disposed outside the cylindrical portion 221 and urges the roller pin 32 toward the bottom of the groove 31. Therefore, when the output side is within the normal load range, the roller pin 32 is disposed so as to straddle both, so that the driving force of the driving side sun gear body 21B can be transmitted to the driven side gear body 22B, and the output side When excessive torque is applied to the roller spring 32, the roller pin 32 escapes from the groove 31 against the urging force of the coil spring 33, so that the driving force of the drive side sun gear body 21B is cut off and is not transmitted to the driven side sun gear body 22B.

(Operation and Effect of Second Second Geared Motor Device 10B)
Again, in FIGS. 1 and 2A and 2B, when the second geared motor device 10B is operated, the driving force of the rotating shaft 12B is the pinion 13B and the sun gear of the second planetary gear mechanism 15B. 20B and the planetary gear 26B, the planetary holder 27B, the carrier pinion 28B, and the idle gear 17B are transmitted to the toilet seat output gear 18B, the toilet seat shaft 5 rotates around the axis, and the toilet seat is driven in the opening direction or the closing direction.

  In the middle of such an operation, for example, when the second geared motor device 10B is driving the toilet seat shaft 5 in the opening direction and an impact is applied to the toilet seat (output side), the operation is inhibited. In the second torque limiter 30 </ b> B, the roller pin 32 pushes and spreads the coil spring 33, escapes from the groove 31 fitted so far, slips, and moves to the adjacent groove 31 to release an excessive force. Such slip is continued while an excessive load is applied. Accordingly, an excessive load is not applied to the gears (pinion 13B, input gear 14B, second planetary gear mechanism 15B, carrier pinion 28B, idle gear 17B) and toilet seat output gear 18B constituting the second power transmission wheel train 19B.

  Moreover, in this embodiment, the torque limiter 30B is incorporated in the sun gear 20B, and controls the torque when the torque is low before the planetary gear mechanism 15B decelerates and no large variation occurs in the torque. . For this reason, since the limiter value of the torque limiter 30B can be set low, in this embodiment, the gears (pinion 13B, input gear 14B, second planetary gear mechanism 15B, carrier pinion 28B) constituting the second power transmission wheel train 19B. The idle gear 17B and the toilet seat output gear 18B) are made of resin, but such a resin gear can sufficiently withstand and is not damaged.

(Other effects of this form)
Further, in this embodiment, the first geared motor device 10A and the second geared motor device 10B are arranged in the opposite directions in the axial direction. That is, in the first geared motor device 10A, the first motor 11A is arranged with the rotating shaft 12A directed in the + Z direction, and in the first planetary gear mechanism 15A, the driving-side sun gear body 21A and the driven-side sun are arranged. While the gear body 22A is arranged so as to overlap in the axial direction and the carrier pinion 28A and the toilet lid output gear 18A are meshed on the −Z direction side, in the second geared motor device 10B, the rotating shaft 12B Is arranged in the −Z direction, and in the second planetary gear mechanism 15B, the driving-side sun gear body 21B and the driven-side sun gear body 22B are arranged in the axial direction so as to overlap with each other in the + Z direction. On the side, the carrier pinion 28B and the idle gear 17B are meshed, and the idle gear 17B and the toilet seat output gear 18B are meshed. For this reason, the toilet lid shaft 4 and the toilet seat shaft 5 are coaxially arranged, and the toilet lid output gear 18A and the toilet seat output gear 18B are arranged at positions spaced apart in the axial direction with substantially the same diameter. However, the first gear-equipped motor device 10A and the second gear-equipped motor device 10B can be arranged in a narrow space within a range in which the toilet lid output gear 18A and the toilet seat output gear 18B are separated in the axial direction. Therefore, the toilet lid / toilet seat opening / closing device 1 can be downsized.

[Other embodiments]
4 and 5 are an explanatory diagram showing the configuration of the toilet lid / toilet seat opening / closing device provided with the geared motor device according to the second embodiment of the present invention, and a plan view showing the layout of the essential parts. Corresponds to a sectional view taken along the line Y1-Y1 'of FIG. The toilet lid / toilet seat opening / closing device of the present embodiment has the same basic configuration as that of the first embodiment, and therefore, common portions are denoted by the same reference numerals and description thereof is omitted. To do.

  In the first embodiment, in plan view, the first geared motor device 10A and the second geared motor device 10B are arranged in parallel, and in the second geared motor device 10B, the carrier pinion 28B and the toilet seat output gear. When mechanically connecting 18B, the idle gear 17B is arranged between the carrier pinion 28B and the toilet seat output gear 18B. In this embodiment, as shown in FIGS. 4 and 5, the first geared motor The first motor 11A of the apparatus 10A and the second motor 11B of the second gear-equipped motor apparatus 10B are arranged on both sides of the toilet lid output gear 18A and the toilet seat output gear 18B, and in the geared motor apparatus 10B, The carrier pinion 28B and the toilet seat output gear 18B are directly meshed without using an idle gear. Since other configurations are the same as those in the first embodiment, description thereof is omitted.

  In the toilet lid / toilet seat opening / closing device 1 configured as described above, the torque limiters 30A and 30B described with reference to FIG. 3 are placed in the sun gears 20A and 20B of the planetary gear mechanisms 15A and 15B, as in the first embodiment. Therefore, even if an impact is applied to the output side during the operation, excessive weight can be released by slipping at the torque limiters 30A and 30B. Therefore, an excessive load is not applied to the gears constituting the power transmission wheel trains 19A and 19B. Further, the torque limiters 30A and 30B are incorporated in the sun gears 20A and 20B, and the torque is reduced when the torque is low before the planetary gear mechanisms 15A and 15B are decelerated and the torque does not vary greatly. Control. For this reason, since the limiter values of the torque limiters 30A and 30B can be set low, even if the gears constituting the power transmission wheel trains 19A and 19B are made of resin, they can be sufficiently endured and are not damaged. Further, since the first geared motor device 10A and the second geared motor device 10B are arranged in the opposite directions in the axial direction, the toilet lid output gear 18A and the toilet seat output gear 18B are separated from each other in the axial direction. The first geared motor device 10 </ b> A and the second geared motor device 10 </ b> B can be arranged in a narrow space within a certain range, and the toilet lid / toilet seat opening / closing device 1 can be downsized.

[Other embodiments]
In the toilet lid / toilet seat opening / closing device according to the first and second embodiments, the torque limiters 30A and 30B are incorporated in both the two geared motor devices 10A and 10B corresponding to the toilet lid and the toilet seat. A torque limiter may be incorporated only in the device.

  In the first and second embodiments, the torque limiters 30A and 30B including the coil spring 33 are used. However, various types of torque limiters such as a torque limiter using a leaf spring instead of the coil spring 33 can be used.

It is explanatory drawing which shows the structure of the toilet lid and toilet seat opening / closing apparatus provided with the motor apparatus with a gear which concerns on Embodiment 1 of this invention. (A), (b) is the top view which shows the layout of the principal part of the toilet lid / toilet seat opening / closing apparatus shown in FIG. 1, respectively, and sectional drawing of a motor mounting part. It is sectional drawing of the torque limiter integrated in the toilet lid and toilet seat opening / closing apparatus provided with the motor apparatus with a gear to which this invention is applied. It is explanatory drawing which shows the structure of the toilet lid and toilet seat opening / closing apparatus provided with the motor apparatus with a gear which concerns on Embodiment 2 of this invention. It is a top view which shows the layout of the principal part of the toilet lid / toilet seat opening / closing apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet lid / toilet seat opening / closing device 4 Toilet lid shaft 5 Toilet seat shaft 6 Case 10A, 10B Geared motor device 11A, 11B Motor 12A, 12B Motor rotation shaft 15A, 15B Planetary gear mechanism 18A Toilet lid output gear 18B Toilet seat output gear 19A , 19B Power transmission trains 20A, 20B Sun gears 21A, 21B Drive-side sun gear bodies 22A, 22B Drive-side sun gear bodies 30A, 30B Torque limiter 31 Groove (concave)
32 Roller pin (engagement member / rotating member)
33 Coil spring

Claims (4)

In a geared motor apparatus having a motor and a power transmission wheel train for decelerating and outputting the driving force of the motor,
The power transmission wheel train includes a planetary gear mechanism in which a sun gear is mechanically connected to the motor side and outputs rotation of the sun gear toward an output gear through the planetary gear,
A geared motor device, wherein a torque limiter is incorporated in the sun gear. 2. The sun gear according to claim 1, wherein a driving side sun gear body mechanically connected to the motor side and a driven side sun gear body meshed with the planetary gear and driven by the driving side sun gear. Prepared,
The gear limiter motor device, wherein the torque limiter is configured between the driving-side sun gear body and the driven-side sun gear body.   The torque limiter according to claim 2, wherein the torque limiter includes a recess formed on one circumferential surface of the drive-side sun gear body and the driven-side sun gear body, and an engagement member inserted into the recess. A spring for urging the engaging member into the recess, and a driving force is transmitted from the driving-side sun gear body to the driven-side sun gear body via the engaging member. A geared motor device.   A toilet lid / toilet seat opening / closing device comprising a geared motor device as defined in any one of claims 1 to 3, wherein at least one of the toilet lid and toilet seat is rotationally driven by the geared motor device. Toilet lid and toilet seat opening and closing device.

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